Machine for making boxes



y ,1931: F. M. JOSLIN HACHINE FOR MAKING BOXES Filed April 11. 1929 eShasta-Sheet 1 Jply 14,1931. F. M.'JOSLIN MACHINE FOR mum BOXES FiledApril 11, 1929 6 Sheets-Shoot 2 July 14, 1931. F. IVl/JOSLIN 1,;814,043

uAcnInE FOR MAKING BOXES Filed April 11. 1929 6 Sheets-sheaf 3 F. M.JOSLIN ucdmz roa IAKING sons 7 luly 1931;

, Filed April 1151929 6 Sheets-Sheet 4 A 11/ M i J ly 1931. F. M. JOSLINCHINE FOR MAKING BOXES Filed April 11. 1929 6 Sheets-Sheet 5 gwuvntoz1931. F. M. JOSLIN CHINE FOR "AKING BOXES Filed April 11. 1929 6Sheets-Sheet 6 Patented July 14, 1931 Q UNITED STATES PATENT orrlcs FUNKH. JOSLIN, F .AMSTERDAM, NEW YORK, ASSIGNOR TO INMAN MANUFACTUR- meCOMPANY, INC 0! AMSTERDAM, NEW/V" YORK, A COEEGTZA'IIGN 9F NEVI YORKMACHINE. son Maxine BoXE-s Application filed April 11, 1928.. Serial No.351,353.

This invention relates to a machine for making paper boxes, in which thesides and ends of the box are folded over to make-the same of doublethickness. The invention a contemplates certain improvements over themachines shown in my prior Patents Nos.

1,356,771 and1,400,292.

One object of the present invention is to provide a plunger for machinesof this char- ;9 aster which is siti-ve and certain in its actions andin w ich both partsof the same are adaptedtobe positively moved, thusdispensing with the use of springs in the plunger as in theconstructions of my said 15 prior patents.

A further object of the invention is to provide 'aplunger in which bothparts of the samewill be simultaneously withdrawn from the die after theoperation of folding the box so iscompleted.

A still further object is to provide a plunger in which the partsthereof are yielding'ly locked'together in two different positions andin which adjustable friction means U are provided for holdin said partsin their 46 forming'a partt-hereof, it being understood" thatvariou'schanges in the details may be resorted to within the contemplated scopeof the invention as hereinafter described and "claimed; in theaccompanying drawifi: ings Figure 1 is a plan view of the machine withcertain parts iremoved'therefrom;

Figure2 is an end view of the same; Figure '3 is a longitudinal sectionon the line 33 of 1.;

Figure 4 is a transverse section on the line 44 of Fig. 1 l

Figure an enlarged elevation partly in section showing the plunger andassociated mechanism;

Figure 6 is a sectional'vie-w on the line 6-6 of Fig.

' Figure-7 is an enlarged end elevation showing the feeding mechanism;Figures Sand 9 are enlarged details of the mechanism employed forelevating the support on which the box blanks areplaced;

liigure 10 is an enlarged detail view of part of the feed mechanism; 1

Figure 11 is a plan View of one ofthe box operate;

Figures 12 and 13 are respectively cross sections on the lines 12-12 and1313. of F 11;

Figure 14 shows one of the boxes which the machine is adapted toproduce, in this figure one of the ends of the box being shown in itspartially folded position; and 5 Figures 15 and 16 illustrate a slightlymodified form of box blank.

The machine is designed to operate upon previously prepared box blankssuch as shown in full lines in Fig. 11 and to fold the sides and ends ofthe same to form a box or tray. h ebody B of the blank has the sides 'Sfolded and glued together to form a double thickness of material. Incutting the blanks the corners are cut away as shown at S so that theglue S does not extend entirely to the ends of the sides. The result isthat the sides S at each end have the tongues S S which are not gluedtogether. This permits such tongues to be folded around as shown in Fig.14 without buckling. The blanks are scored along the lines S tofacilitate upward folding of the sides S. The ends of the-blank consistsof two portions E, E The present machine applies glue to'the portions E?as shown at E and also scores the same'along the line E scores E beingpreviously made in forming the blank. The machine finally folds thesides S of the blank upwardly and turns the tongues S S inwardly, and italso folds the ends E upwardly andfoldstheap'ormo '05 blanks on whichthe machine is adapted to tions E inwardly and downwardly over thetongues S S and against the inner surface of the side portions E.

lVit-h the form of blank shown in Figs. 15 and 16, the sides are made upof the portions M, M, the latter being folded over on the former, butthe ends M of the portion M are not cut awa 1 but are folded over on topof the portions 1. When this form of blank is used, the machine isprovided with a scoring roll adapted to make a score at M so that theextreme ends of the sides may easily fold inwardly as previouslydescribed. The ends N, N in this form of blank are substantially thesame as that shown in Fig. 11, the machine having rolls to score suchblank along the lines N Referring now to the accompanying drawings ofthe machine, the letter F indicates generally the frame thereof, inwhich the main drive shaft is supported and to which power is appliedfrom any suitable source as the belt wheel 11, a clutch device 12operated by a rod 13 from a handle it serving to connect and disconnectthe shaft and belt wheel 11 at will. The shaft 10 is connected throughgears 10a and 10b to a shaft 15 extending longitudinally beneath themain frame F the machine.

. Mounted on the frame F is a guide in which a slide 21 reciprocatesvertically and from which the horizontal arm or cross head 22 extends,the latter serving to operate the plunger, later described. The lowerend of the slide 21 is provided on one edge with rack teeth 21a whichare engaged by a gear wheel 23 mounted on a shaft 24; carrying a secondgear wheel 25 which in turn meshes with a rack 26. The rack 26 isconnected to aslide 27 which reciprocates between guides 28, being thusreciprocated in opposite directions by means of cams 29 secured on theshaft 15. By this means the slide 21 is given its reciprocating motion.

Pivoted on a standard 30 connected to the frame F is a rocking lever 31.As this lever is rocked, it transmits motion to a part of the plunger,as hereinafter described. The lever 31 is operated through the medium ofa slide mounted in a guide 33 and carrying a cam roller 34 whichcontacts with a cam 35 on a shaft 36, the latter being operated by asprocket chain 37 from a shaft 38 extending transversely beneath themachine frame and connected by bevel gears 39 to the shaft 15.

The die of the machine in which the blanks are folded and compressed, isillustrated generally at 10. One side or wall 40a of the die is mademovable and the same is operated by a slide %1 to which said wall issecured and connected to the slide a l are toggle links 42, tne jointsof which are engaged by cams 43 mounted on a shaft as which is rotatedby means of'a sprocket chain l5 driven from jection on the machine frameand the other end thereof, through the medium of a roller, bears upon acam 51 carried by the shaft 15. By this means the member 16 of the dieis caused to move downwardly into the die at certain intervals, thismovement, of course, taking place in timed relation with the movementsof the plunger, as hereinafter described, and the movements of the sidewall atOa of the die.

The mechanism for feeding the box blanks to the die comprises twoparallel racks 55 arranged to slide in the frame of the machine. Theseracks are'reciprocated through gears 56 secured to the transverse shaft57, the end of which is provided with another gear engaged by a rack bar58 operated by a. crank disk 59 secured to the transverse shaft 38. Therack bars 55 are provided at spaced intervals with upwardly projectinglugs 60, 61 and 62, the purpose of which will later appear. Secured tothe upper surface of they rack bars 55, are plates which form in eflecta. platform 63 on which the blanks are deposited as the platform ismoved. to its extreme right-hand position (Fig. l) as later pointed out.arranged on eachside of the rack bars 55 and spaced therefrom arestationary bars and pivotally depending from these bars are holding dogs66 and 67.

From the foregoing it will be understood that as the platform 63connected to the rack bars is moved to the right and a blank isdeposited thereon, the blank will be carried toward the left on thereturn movement of the platform, the blank being pushed along by meansof the lugs 62. The platform is moved a sufficient distance to bring therear end of the blank past the first set of dogs 66 after which theracks again move toward theright. Suchmovementwillbring the dogs 61 backof the rear edge of the blank and on the next movement of the rackstoward the left, the dogs 61 will push the blank a second step towardthe die or, in other words, will push it past the second set of dogs 67.Upon the next reciprocation of the racks 61, the lugs thereof will comebehind the rear edge of the blank and push it into position on the die.

The blanks are supplied to the platform 68 by means of the followingmechanism: Arranged adjacent the end of the machine is a blank support70 which is adapted to carry a ,pile of blanks a. 'Eh'e support; 70 iscar riediby a rack bar 71 which slidesthrougha casing 72securcd to themachine irame. A.

gear wheel 73 mounted in the casing ITQ enages the rack bar 71 and thisgear Wheel is rictionally connected to a worm wheel 74- which isoperated by a. worm 7 5 one. shaft 76, the latter being connectedthrough is, oneway clutch 7 7 to a gear wheel 78 which in urn isoperated b'ya rack bar 7 9 connected to acltal k 80 mounted on thetransverseshaft81.

Theshaft S1 is rotated fromthe shaft 38 through the sprocket chain .82.

Y The worm Wheel 74 and the hub of the gear wheel 73 are provided withlintenenga'ging firictional surfaces, indicatedat 83. The gearwheel'73is connected to a short shaft 84 which projects through thecasing 72, the worm wheel 74 being freely rotatable onthis shaft.

By "moving the shaft-8, 1 longitudinally in-.

wardly or outwardly, the gear. Wheel .73 may be disconnected from theworm Wheel 74. This mechanlsmserves asa friction clutch by whichmovementof theiblanik supportT 0 may i he stopped at anv time desired.

The rack bar 71 is also engaged by a. second gear 85 connected to a.shaft 86 provided 1 with a handle 87 whereby the support 70 may beoperated manually whenever desired.

Pneumatic mechanism is provldedfor hit- .lflg lillfi blanksone by onefrom the pile and depositing the sameon the platform 63. This mechanismcomprises suction cups indicated at 90 which are connected by a hose 91to a pump arranged at any suitable point, being indicated at92 adjacentthe shaft 10 and operated through gears 92a rotated-from said shaft."Suitable valve mechanism is provided for breaking and restoring thesuction in the suction heads 90 at proper intervals, such meehanisnbeing shown at 93 and being opcrated'by a cam Ms-soured to the shaft 81.

Y to the shaft 81.

The suction heads 90 are'carried on a transverse bar 95 connected to aslide 96 which is operated by alever -97 pivoted to the frame. of themachine and having intermediate its ends a wheel 98 bearing on a cam 99secured that time, the blank will be deposited on the lat-form 63 andmoved toward the die, as eforc described. After the platform 03 moves tothe left, the suction heads Will again descend and pick a another blankand the operation will thus be repeated. As the blanks are moved towardthe die they pass beneath the creasing rolls 100 which score the samealong the line E, heretofore mentioned (Fig.11). These creasing rollsare secured to the transvermishattiol which" is rotated through asprocket chain. 102 tram the transverse: shaft 38.: Other scoring musmay-also be applied torthe {shaft 101 forproducing the Y scoresM" in themodified form of blank heretofore mentioned (Figs. 15-. and

16)., .Aslthe blanks :pass through the rolls,

glue is. applied to the portions .E 'IthereoL-as previously indicated11).,such glue ap,

plying apparatus being substantial'lyithe same as that shown in. my saidprior patents and;

indicated generally at 10.3 and being driven by 1 suitable gears :fromthe scoring roll shaft.

Some. of the .main features of the present invention relate to :theplunger. which is'zemployed toforce :the blanks into the die and turnerfold theedgesof thesame to dormthe completed box. This :plungercomprises .a

body portion 105 and a. bottom portioniltldl the latter beingmovable-toward and :fnomtheformer and the bottom portion has a plural.

vity of guides 106a .extendingiupwardly and slidably engaging notches inthe sides of the body portion :105, theseguides serving to align theparts of the plunger; The bottom: portion .106 also has'seoured thereto.sta nd-f a-rds 107 which extend upwardly. through.

suitableopeningsintheabody portion'105 and which are .connectedat t heir.upperends by across bar 1107a. This :body portion Mlfi-zis connected to.the reciprocating ,crossahead 22,

heretofore mentioned, through the medium;

of a member 108, thebottom of which .isprovided' with lateral flanges108a which are-engaged by angle bars109 secured to the bot-u tom portion106 of thepluznger. 'llhe conncction between the member108 and theportion 105 of theplunger is such .asto permit um itcd sidewise orlateral movementiof the lat;- ter, as wildclearly appear from Figs. 5and 6. Such limited lateral movement is yieldingly resisted by means ofa coiled spring 110 mounted in a socket in the member108 and arranged toengage the body po-rtion'105of the plunger.

The limited lateral movement of the body portion 1050f the plunger isprovided so that when this portion of the plunger enters the-- die and"the movable wall 40a is advanced against the plunger to tightly pressvthe folded partsof the box together, the plunger will be cziilpable' ofyielding to a slight degree latera y V 106 of the plunger have connectedthereto pivoted wings 111 which normally'swing outwardly under theinfluence of springs. 112*, such outward movement being limited bystops'113. It will be understood that when 1'.

the bottom portion-106 of the plunger ismoved into proximitytothe bodyportion 105, or vice versa, the wings 1'11' wil l be caused to swinginwardly on their pivots and when the two portions of the plunger arebrought The standards 107 of the bottom portion into contact these wingswill be housed in recesses a of the body portion.

Means are provided for yieldably locking the two portions of the plungertogether in two different positions, one position being that in whichthe bottom portion is remote from the body portion, as illustrated inFig. 5, and the other being that in which the bottom portion is adjacentto or in contact with the lower end of the body portion; Such lockingmeans comprise recesses formed in the standards 10?, two of theserecesses being at one level and two at a lower level. These recesses areadapted to be engaged by spring pressed balls 116 mounted in housings117 secured to the body portion 105 ofthe plunger. The halls 116 arebacked up by plugs 118 engaged by coiled springs 119 arranged in thehousings 117. The tension of the coiled springs 119 can be regulated byscrzew plugs 119a threaded into the housings 11 From the foregoing itwill be apparent that when the bottom portion 106 of the plunger isforced downwardly into the position shown in Fig. 5, the balls 116 willenter the upper recesses 115 and yieldably lock the two parts of theplunger together. Also when the bottom portion 106 is moved upwardlyorwhen the body portion 105 is moved downwardly, the balls 116 willenter the lower recesses 115 to lock the parts together in the otherposition.

The body portion 105 of the plunger is provided with means forfrict-ionally engaging one or both of the standards '10? on the bottomportion. As illustrated particularly at the top of Fig. 6, such frictionmeans comprises a friction plate 120 backed up by a spring 121 mountedin a housing 122 secured to the upper part of the body portion 105 ofthe plunger. The tension of the spring 121 can be regulated by anadjustable screw 123 threaded into the housing. a

A brief description of the operation of the machine will suffice. Asbefore noted,tthe blanks are lifted from a pile by the suction apparatusand'by means of the reciprocating feeding device they are moved intoposition above the die, the glueing and scoring opera-. tion takingplace during such feeding movement. As the blanks are moved to the die,they are positioned on the member 46 beneath the plunger. With the partsof the plunger in the posit-ion shown in Fig. 5, the cross head 22 ismoved downwardly, carrying with it the body portion 105 of the plungerand also the bottom portion 106 thereof. WVhen the latter comes incontact with member l6 of the die, the blank will be clamped inposition. Further downward movement of the bottom portion 106. of theplunger is momentarily prevented and consequently the yieldable lockingmeans between the two portions of the die will break or yield and thebody portion 105 of the plunger will continue its downward movementduring which time the bottom por tion 106 of the plunger is held firmlyin contact with the blank due to the friction between the two parts ofthe plunger produced by the friction plates 120. As the body portion ofthe plunger continues its downward movement, the lower end thereofstrikes the wings 111 and swings the same inwardly. Just prior to thetime the body portion 105 strikes thewings 111, the member 46 of the dieyields and permits the bottom portion 106 of the plunger to movedownwardly into the die. As this takes place the edges of the box blankare folded upwardly by the sides of the die. YVhen the member 16 of thedie reaches its innermost position, further downward movement of theportion 106 of the plunger is stopped and as the portion 105 continuesto move downwardly the Wings 111 are swung inwardly and these wingscontact with the edge portions E of the box blank and bend the sameinwardly in the path of the descending body portion 105. These inwardlybent edges of the blank are therefore struck by the body portion of theplunger as it continues to descend and are further bent into asubstantially vertical position or in contact with the portions E of thebox. As the body portion of the plunger thus moves downwardly into thedie and folds the margins of the box blank inwardly against the sidesthereof, the wall iOa of the die moves inwardly and tightly grips theplunger, thus pressing the folded edges of the body tightly together.

'lVhen the body portion of the plunger is thus forced downwardly to itslowest position, the parts thereof will be locked together by reason ofthe spring-pressed balls 116 entering the lower recesses 115.Consequently when the cross head 22 is again raised, both parts of theplunger will be moved upwardly and the lower portion thereof will beposition, as illustrated particularly in Fig. 3.

In order to restore the parts to the position shown in Figs. 5 and 6,the lever 31 is now ion . tioned against or adjacent to the bodyporoperated by the means heretofore described,

which contacts with the cross head 107a and moves the same downwardlyalong with the standards 107 and the bottom portion 106. When the bottomportion of the plunger is thus moved downwardly, the wings 111 willswingoutwardly into their normal position, as shown in Fig. 5, and theparts will be in the position for another operation.

After the boxes are completed, they are pushed upwardly from the die bythe member 46 upon its return movement, and an ejector bar 125, operatedfrom a cam 126 through a is claimed as new and desired to be secured byLetters Patent is:

- ward said die.

' 1..I1n.a machine of the kind1described,the cmnbination of. a die anda' plunger cooper ating; therewith, said: plunger comprisin a bodyportion and abottom portion-, yielda le' means for locliingsaidportionsltogether with bottom portion in advance of or in proximity tosaid body portion, and means fimfsimultaneously movingl'saidportions're+ mecbivelytowa'rd oraway from'the die'whenusilockedtogether.

2; "In amachine of the'kindi described, the combination of a die andv aplunger cooper btingutherewith, said plunger comprisin a bodypor'tiomanda bottom portion mova le mhtive to each other, separate means for movingsaid portions-toward said die, oneof said means serving: tosimultaneously move saidaportions-away from-said die.

3; In a machine of thekind described, the combination of a: die and aplunger cooper sting: therewith, said plunger comprising. a bodyportionand a bottom portion movable relative to each other, means for firstmoving said bottom portion a predetermined distance toward said die andseparate meansfor theres'ffler simultaneously moving said portions-to4;; Ida machine-of the'kind described', the combination of. a' die and'aplunger cooperating therewith, said plunger comprisinga body portionand a bottom portionmovable relative to=eachsother,means for firstmoving said bottom portiona'predetermined distance toward said diecwhilesaid body portion is held stationary and-separate means for. there aftersimultaneously:movingsaidportions to: wardsaiddier a a r 5, Inamachineof; the kind described, the

v combination" of. a die and a plunger coopercan nting therewith, saidplunger comprising a body portionand abottomsportion movable relative-toeach other, means for movingsaid plunger toward andifrom said: die, and.yieldsblemea-ns for locking said portions together 'in t-Wo diiferentpositions.

6. Ina machine of thekinddescribed, the

' combination of a die and a. plunger coopersting therewith, saidplunger comprising a body portion and a bottom portion! movable relative:to each other, means for moving said plunger toward and: from said die,.yieldable meansfor locking said, portions together inv twodifler'entpositions and: adjustable friction-meanscarried by one of saidportionsand engaginig the other portion- Q7. In a-machine-of the kinddescribed, the combination of-aldieva'nda plunger cooperating therewith,said plunger comprising a portion and abottom portion movablenelativeito each other, means for first moving said bottom portion: apredetermined distoward said die, yieldable means for loeking 'saidbottom pontion to 'saidbody pore tion-afterthe former has-been moved asaforesaid and separate means for thereafter simultdle; a A

8." In a. machine of the" kind described, the

combination a of a die and: a plunger cooper atingrtherewith, saidplunger comprisin' a g body portion and HQbOlZbDHLIJ OI'tlOIYIDOVBQ lerelative to :each other, mechanism for mov 111g: sald bottom portiontoward 821d die,

taneously moving; saidportions toward said yieldable meansfor. lockingsaidportions' together after the bottom portion'has been moved towardthe die, and other mechanism operatingv in: timed; relationtwith said.first named mechanism for: thereafter simultane plusl'ymoving both saidportions toward said 9. In a machine of the kind'describe'd thecombination of a die and a plunger cooper ating' therewith, said plungercomprising a body portion and a bottom portion, aid: bot; tomportion'being'm-ovable intoa positionrc; mote from or adjacent to saidbody portion, yieldablemeansfor locking said portions to gether ineachof' saidiposit-ions; and means, I

formovingiboth of said portions toward and fromthe die. H

10. Inamachine'ofthekind described,the

simultaneously'withdhawsaid portions from 1 the die,.and means forholding said portions" against relative movement while beingthuswithdrawn; 7

11. In a machine'of. the kind described, the combination ofiaz die anda= plunger cooper ating therewith said plunger comprisin 'a body portionandzabottom portion'imov-a' le relative-to each other, oneor morepivoted wings mounted to move: with said bottom portion anda'rran'ged.to be: engaged by the' body portion and: swung thereby when the bottomportion is held stat-ionaryand the body: portion m'ovesa toward the die,mechanismifor moving said bot-tomep'ortion toward thewdle, other?mechanism. forv moving said body portion toward the. die and relative tosaid bottom portion, whereby said wings are swungiabout their. pivots.

12. In a machineof theki'n'd described',.the combination'fof a die and aplunger [cooperating therewith said plunger comprisingxa: body portion.and a: bottom portion movablerelative to each other, one ormore pivoted.wings mounted to move with said bottom portion and arranged to beengaged by the body portion and swung thereby when the bottom portion isheld stationary and the body portion moves toward the die, mechanism formoving said bottom portion a predetermined distance toward the die,other mechanism for simultaneously moving both of said portions towardthe die until said bottom portion is stopped in its movement and forthereafter moving the body portion further toward the die and relativeto the bottom portion, whereby said wings are swung about their pivots.

13. In a machine of the kind described, the combination of a die and aplunger cooperating therewith, said plunger comprising a body portionand a bottom portion, mechanism for moving said bottom portion apredetermined distance towardthe die, other mechanism for moving saidbottom portion against the die, whereby the same is held stationary,said last named mechanism serving to move said body portion toward thedie and relative to said bottom portion after the latter is heldstationary, one or more pivoted wings mounted to move with said bottomportion and arranged to be engaged by the body portion and swung therebyWhen the bottom portion is held stationary and the body port-ion ismoved relative thereto.

14. In a machine of the kind described, the combination of a die and aplunger c0- operating therewith, said plunger comprising a body portionand a bottom portion movable relative to each other, yieldable lockingmeans between said portions and means for adjusting saidlockingmeans toregulate the pressure at which the same will yield.

15. In a machine of the kind described, the combination of a die and aplunger cooperating therewith, said plunger comprising a body portionand a bottom portion movable relative to each other, yieldable meansfor. locking said portions together with said bottom portion in advanceof said body portion, mechanism for simultaneously moving said portionstoward the die while they are locked together, said die having a partadapted to contact with and stop the movement of said bottom portion,whereby said locking means yields and permits said body portion tocontinue its movement toward the die, and means for adjusting saidlocking means to regulate the pressure at which the same will yield.

16. In a machine of the kind described, the combination of a die and aplunger for cooperating therewith, said plunger comprising a bodyportion and a bottom portion, means for moving said body portion towardand from said die, yieldable means for looking said bottom portion tosaid body portion 1 when the latter is moved toward the die,

and means carried by one of said portions and engaging the other tocause said portions to move together when said body portion is moved.away from thedie.

17. In a machine of the kind described, he combination of a die and aplunger for cooperating therewith, said plunger comprising a bodyportion. and a bottom portion movable relative to each other, means formoving said body portion toward and from said die and means for causingsaid bottom portion to travel with said body portion as the latter movesaway from the die, said last named means comprising a yieldable lockingdevice carried by one of said portions and engaging the other portion.

18. In a machine of the kind described, the combination of a die and aplunger for cooperating therewith, a reciprocating member for movingsaid plunger toward and from said die, means for connecting said plungerto said member to permit limited lateral movement of the plungerrelative to the member.

19. A construction as defined in claim 16 having resilient means forresisting said lateral movement of the plunger.

20. In a machine of the kind described, a die having one wallthereof'movable laterally, mechanism for moving said wall, a plungermovable into and out of said die, a reciprocating member for moving saidplunger into and out of the die, means connecting said plungerto saidmember to permit limited lateral movement of the plunger by said movablewall of the die.

'21. In a machine of the kind described, a die having a bottomtherein, aplunger adapted to contact with said bottom and move into said die,mechanism for operating said plunger toward and from the die, and othermechanism, operating in timed relation with said first named mechanism,for causing said bottom to'recede into the die as said plunger movesinto the die and to move outwardly when said plunger is withdrawn fromthe 7 die.

22. In a machine of the kind described, the combination of a die and a.plunger cooperating therewith, said plunger comprising a body portionand a'bottom portion, yieldable means for locking said portions togetherwith the bottom portion in advance of the body portion, and means forsimultaneously moving said portionstoward the die when thus lockedtogether, and friction means carried by one of said portions andengaging the other portion.

23. In a machine of the kind described, the combination of a die and aplunger cooperating therewith, said plunger comprising a body portionand a bottom portion, yieldable means for locking said portions togetherwith the bottom portion in advance of the body portion, means'forsimultaneously moving said portions toward the die when thus lockedtogether, means for stopping the movement of said bottom portion whilesaid body portion continues to move toward the die, thereby breakingsaid locking connection between said portions, means for moving saidbody port-ion away from the die and means carried by one of saidportions and engaging the other, whereby said bottom portion is movedaway from said die simultaneously with said body portion.

24. In a machine of the kind described, the combination of a die and aplunger cooperating therewith, means for moving said plunger toward andfrom the die, said plung er comprising a body portion and a bottomportion, yieldable means for locking said bottom portion of the plungerin advance of said body portion when the plunger is moved toward thedie, said yieldable means also serving to lock said portions togetherwhen the plunger is moved away from the die.

25. In a machine of the kind described, the combination of a plunger anda die, said plunger comprising a body portion and a bottom portionmovable relative to each other,

yieldable means for locking said portions together with said bottomportion in advance of the body portion, means for moving said plungertoward the die with the bottom portion thus positioned in advance of thebody portion, means associated with the die for stopping the movement ofsaid bottom portion while said body portion continues to advance towardthe die, whereby said body portion moves into proximity to said bottomportion, said yieldable means serving to lock said portions togetherwhen thus brought into proximity, and means for again forcing the bottomportion into position in advance of the body portion after the plungerhas been" moved away from the die.

26. A plunger for a box making machine comprising a body portion and abottom portion, yieldable means for locking said portions together withthe bottom portion in advance of the body portion, said yieldable meansalso serving to lock said portions together with the bottom portion inclose proximity to the body portion. I

In testimony whereof I hereunto aflix my signature.

FRANK M. J OSLIN.

